Improvement in bank-notes, bonds, revenue-stamps



JAMES DUTHIE. lm pr ovementin Bank Notes Bonds Revenue Stamps, &c. N0.125,550, PatentedApril9,1872.

Imp V n W UNITED STATES PATENT QFFIoE.

JAMES DUTHIE, on NEW YORK, n. Y.

Specification forming part of Letters Patent No. 125,550, dated April 9,1872.

To all whom it may concern.-

Be it known that I, JAMES DUTHIE, of the city of New York, in the countyand State of New York, have invented a new and improved method ofpreventing the removal of the cancellation of stamps and the reuse ofthe same, and the alteration of checks, notes, and all other kinds ofdocuments in writing, in such manner and by causing a disfigurement ofthe stamp or document that will be clearly observable; and I do herebydeclare that the following is a full and exact description thereof,reference being had to the accompanying drawin gs and illustrations,marked 1 2 3 4 5, makin g a part of this specification.

The nature of my invention consists in preparing the stamp, check, note,or other document, either before or after printing or writing the samewith a thin coating of writing-ink or fluid, by pen-ruling the same withthe said ink or fluid in various forms or devices, colors, orcombination of colors.

To enable others skilled in the art to make and use my invention, I willproceed to describe its manufacture, first promising that by the wordink I mean the fluid employed in writing with a pen, which is a dye, theother inks, such as Indian ink, stamping or printingink, being paints,whether mixed with oil or water. i

In preparing paper to be used for printing stamps, blank-checks, ornotes, or any other form of blanks or written or printed documents, orafter it has been so printed or written upon I rule in a base or groundwith fluid writingink, by machinery or by hand, with a pen or pens, andin any or all colors, combinations, or designs, capable of being madeout of the known writing-inks. Some of these forms are shown in theillustrations which form a part of this specification, and are marked 12 3 4 5, in which the base or ground is ruled in with a pen or pens andwith fluid writing-ink. The object and merit in thus pen-rulin g in thebase or ground in writing-ink is that thus the ground and the ink usedin writing thereon with a pen are the same in their chemical properties,and any attempt to remove the writing or cancellation by washing withacids will also and unavoidably remove the ground-Work by dissolving it,while the combination of colors, as is well known, will render thedesign mor dithcult to photograph; and, further, the paper for the useor reception of the writing-ink must be sized, and the use of acid uponit destroys to a great extent this sizing, so much. so as to preventother writing-ink lines from being again ruled over the place where theacid was used or applied.

I do not claim the use of a ground-work of any printing inks, fugitiveor otherwise, whether ruled or coated on the paper, nor colors nordesigns of the same, nor the mode or method of applying the same; but

What I do claim as my invention, and desire to secure by Letters Patent,is-- The use of a ground-work of writing-ink of different colors uponnotes, checks, &c., applied by any of the known means of pen-rulin g,substantially as and for the purposes set forth.

JAMES DUTHIE.

Witnesses:

JAMES MKEEN, D. O. VAN Corr.

